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DOI | 10.1175/JCLI-D-19-0041.1 |
Two Distinct Types of Extratropical Circulation Anomalies Associated with Cold Surges over the South China Sea | |
Pang, Bo; Lu, Riyu1 | |
2019-08-01 | |
发表期刊 | JOURNAL OF CLIMATE |
ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2019 |
卷号 | 32期号:16页码:5069-5084 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | This study investigated the extratropical circulation anomalies responsible for cold surges over the South China Sea in winter. The surge events were identified by the intensity of northerly winds over 110 degrees-117.5 degrees E along 15 degrees N at 925 hPa. Two distinct patterns of sea level pressure (SLP) anomalies in East Asia were found to have a crucial role in inducing cold surges over the South China Sea. Accordingly, the cold surge events were classified into two types. The first type of cold surge is characterized by a pair of SLP anomalies with positive and negative ones centered over China and Japan, respectively, whereas the second type of cold surge is characterized by widespread and persistent positive SLP anomalies over East Asia. Furthermore, the first type of cold surge is accompanied by a deepened East Asian trough and precursory Rossby wave trains across the Eurasian continent in the mid- and upper troposphere, but the latter is not. Prior to both types of the cold surges, the Siberian high is significantly intensified. However, diagnosis of the SLP tendency indicates that the intensification is related to different physical processes. In the first type of cold surge, the Rossby wave trains favor negative vorticity advection and cold advection, inducing intensification of the Siberian high. By contrast, in the second type of cold surge, vorticity advection can be ignored due to the lack of Rossby wave trains, and only the lower-tropospheric cold advection induced by anomalous northerly winds, resulting from the anomalous Siberian high, contributes to the further intensification of the Siberian high. |
英文关键词 | Atmospheric circulation Cold air surges Synoptic climatology |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000475909100002 |
WOS关键词 | ASIAN WINTER MONSOON ; NEAR-EQUATORIAL DISTURBANCES ; PERSISTENT LOW-TEMPERATURE ; MADDEN-JULIAN OSCILLATION ; DECEMBER 1974 ; INTRASEASONAL AMPLIFICATION ; INTERANNUAL VARIATION ; ARCTIC OSCILLATION ; JET-STREAM ; MONEX AREA |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/185728 |
专题 | 气候变化 |
作者单位 | 1.Univ Chinese Acad Sci, Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Numer Modelling Atmospher Sci & Geo, Beijing, Peoples R China; 2.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China |
推荐引用方式 GB/T 7714 | Pang, Bo,Lu, Riyu. Two Distinct Types of Extratropical Circulation Anomalies Associated with Cold Surges over the South China Sea[J]. JOURNAL OF CLIMATE,2019,32(16):5069-5084. |
APA | Pang, Bo,&Lu, Riyu.(2019).Two Distinct Types of Extratropical Circulation Anomalies Associated with Cold Surges over the South China Sea.JOURNAL OF CLIMATE,32(16),5069-5084. |
MLA | Pang, Bo,et al."Two Distinct Types of Extratropical Circulation Anomalies Associated with Cold Surges over the South China Sea".JOURNAL OF CLIMATE 32.16(2019):5069-5084. |
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